How to convert DCMTK-dcm-image to OpenCV-Mat-image (language-c++) [on hold]

I am using DCMTK to read DICOM image, now I want to convert the dcm image into Mat image to use OpenCV functions. Here is the code to read .dcm image into a DicomImage variable.

 DicomImage DCM_image("D:\headOneSlices512\Slice77.dcm");
 DCM_image.setMinMaxWindow(); //DCM image